package com.zhsq.zlc.util;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;

public class FileUtil {

    /**
     * 复制单个文件
     * @param oldPath String 原文件路径 如：c:/fqf.txt
     * @param newPath String 复制后路径 如：f:/fqf.txt
     */
    public static void copyFile(String oldPath, String newPath) {
        try {
            int bytesum = 0;
            int byteread = 0;
            File oldfile = new File(oldPath);
            if (oldfile.exists()) { //文件存在时
                InputStream inStream = new FileInputStream(oldPath); //读入原文件
                FileOutputStream fs = new FileOutputStream(newPath);
                byte[] buffer = new byte[1444];
                int length;
                while ( (byteread = inStream.read(buffer)) != -1) {
                    bytesum += byteread; //字节数 文件大小
                    fs.write(buffer, 0, byteread);
                }
                inStream.close();
            }
        }
        catch (Exception e) {
            System.out.println("复制单个文件操作出错");
            e.printStackTrace();

        }

    }
    /**
     * 删除文件
     * @param filePathAndName String 文件路径及名称 如c:/fqf.txt
     */
    public static void removeFile(String filePathAndName) {
        try {
            String filePath = filePathAndName;
            filePath = filePath.toString();
            File myDelFile = new File(filePath);
            myDelFile.delete();
        }
        catch (Exception e) {
            System.out.println("删除文件操作出错");
            e.printStackTrace();
        }
    }

    /**
     * 删除文件夹
     * @param folderPath 文件夹完整绝对路径
     */
    public static void deleteFolder(String folderPath) {
        try {
            deleteAllFile(folderPath); //删除完里面所有内容
            String filePath = folderPath;
            filePath = filePath.toString();
            java.io.File myFilePath = new java.io.File(filePath);
            myFilePath.delete(); //删除空文件夹
        } catch (Exception e) {
            e.printStackTrace();
        }
    }


    /**
     * 删除指定文件夹下所有文件
     * @param path 文件夹完整绝对路径
     */
    public static boolean deleteAllFile(String path) {
        boolean flag = false;
        File file = new File(path);
        if (!file.exists()) {
            return flag;
        }
        if (!file.isDirectory()) {
            return flag;
        }
        String[] tempList = file.list();
        File temp = null;
        for (int i = 0; i < tempList.length; i++) {
            if (path.endsWith(File.separator)) {
                temp = new File(path + tempList[i]);
            } else {
                temp = new File(path + File.separator + tempList[i]);
            }
            if (temp.isFile()) {
                temp.delete();
            }
            if (temp.isDirectory()) {
                deleteAllFile(path + "/" + tempList[i]);//先删除文件夹里面的文件
                deleteAllFile(path + "/" + tempList[i]);//再删除空文件夹
                flag = true;
            }
        }
        return flag;
    }
    /**
     * 移动文件到指定目录
     * @param oldPath String 如：c:/fqf.txt
     * @param newPath String 如：d:/fqf.txt
     */
    public static void moveFile(String oldPath, String newPath) {
        copyFile(oldPath, newPath);
        removeFile(oldPath);
    }
}
